12.2.1 The freeboard mark applied should be positioned
port and starboard at amidships on the load line length and may be
an all-seasons mark. The mark should be a permanent disc and be of
contrasting colour to the hull of the vessel in way of the mark.
12.2.2 The fresh water freeboard allowance should
be obtained by deducting from the all-seasons freeboard assigned,
the quantity
where:-
Δ |
= |
the displacement
in salt water in tonnes at the all-seasons draught |
T |
= |
tonnes per centimetres
immersion at the all seasons load waterline |
Alternatively the deduction may be taken as 1/48th of the all-seasons
draught of the ship at amidships.
12.2.3 A vessel should not operate in any condition
which will result in its appropriate freeboard marks being submerged
when it is at rest and upright in calm water.